1.10.1 BLOX.BContainer: accessing

setVerticalLayout: aBoolean

Answer whether the container will align the widgets vertically or
horizontally. Horizontal alignment means that widgets are
packed from left to right, while vertical alignment means that
widgets are packed from the top to the bottom of the widget.

Widgets that are set to be “stretched” will share all the
space that is not allocated to non-stretched widgets.

The layout of the widget can only be set before the first child
is inserted in the widget.